================================================================== BUG: KASAN: slab-out-of-bounds in memset include/linux/string.h:384 [inline] BUG: KASAN: slab-out-of-bounds in xfrm_attr_cpy32+0x15a/0x1d0 net/xfrm/xfrm_compat.c:393 Write of size 4 at addr ffff88802741b9dc by task syz-executor.4/11736 CPU: 0 PID: 11736 Comm: syz-executor.4 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xae/0x4c8 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 memset+0x20/0x40 mm/kasan/common.c:84 memset include/linux/string.h:384 [inline] xfrm_attr_cpy32+0x15a/0x1d0 net/xfrm/xfrm_compat.c:393 xfrm_xlate32_attr net/xfrm/xfrm_compat.c:426 [inline] xfrm_xlate32 net/xfrm/xfrm_compat.c:525 [inline] xfrm_user_rcv_msg_compat+0x76b/0x1040 net/xfrm/xfrm_compat.c:570 xfrm_user_rcv_msg+0x55b/0x8b0 net/xfrm/xfrm_user.c:2714 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 xfrm_netlink_rcv+0x6b/0x90 net/xfrm/xfrm_user.c:2764 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7faf549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f55a90cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020002740 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 11736: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461 kmalloc_node include/linux/slab.h:575 [inline] kvmalloc_node+0x61/0xf0 mm/util.c:575 kvmalloc include/linux/mm.h:765 [inline] xfrm_user_rcv_msg_compat+0x3cd/0x1040 net/xfrm/xfrm_compat.c:566 xfrm_user_rcv_msg+0x55b/0x8b0 net/xfrm/xfrm_user.c:2714 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 xfrm_netlink_rcv+0x6b/0x90 net/xfrm/xfrm_user.c:2764 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Last call_rcu(): kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_record_aux_stack+0xc0/0xf0 mm/kasan/generic.c:346 __call_rcu kernel/rcu/tree.c:2953 [inline] call_rcu+0xbb/0x700 kernel/rcu/tree.c:3027 __key_link+0x146/0x360 security/keys/keyring.c:1372 __key_instantiate_and_link+0x354/0x5b0 security/keys/key.c:457 key_create_or_update+0x72c/0xdf0 security/keys/key.c:937 __do_sys_add_key+0x215/0x430 security/keys/keyctl.c:134 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c The buggy address belongs to the object at ffff88802741b800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 476 bytes inside of 512-byte region [ffff88802741b800, ffff88802741ba00) The buggy address belongs to the page: page:000000001f0783fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27418 head:000000001f0783fc order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head) raw: 00fff00000010200 ffffea0000831000 0000000300000003 ffff888010041280 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88802741b880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88802741b900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88802741b980: 00 00 00 00 00 00 00 00 00 00 00 04 fc fc fc fc ^ ffff88802741ba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802741ba80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================